Re: [platform-dev] Clipboard: understand late-cut

[Rolf Theunissen <rolf.theunissen@xxxxxxxxx>]

Hi Thomas,

On a closer look, indeed that doesn't help you much. I am not an expert on the topic, but I guess the answer is you cannot.

I looked at the win32 implementation and some windows API documentation [1]. To be able to detect that a move was requested, the CFSTR_PREFERREDDROPEFFECT data should be extracted and examined. This data field seems only to be referenced in DragSource, so I don't think this functionality is implemented in the win32 SWT. Moreover, when I cut a file in the file explorer and paste it in Eclipse: The file is marked as cut in the file explorer, the file is copied to Eclipse, the file remains marked as cut in the file explorer. This is another clue that this is not implemented.

[1] https://docs.microsoft.com/en-us/windows/win32/shell/datascenarios#handling-delete-on-paste-operations

Op di 26 jan. 2021 om 20:52 schreef Thomas Singer <ts-swt@xxxxxxxxxxx>:

Hi Rolf,

Sorry, I don't understand how this answers my question. The normal text
copy-paste I understand. I also understand how to retrieve the copied
file paths (FileTransfer), but how to find out whether an application
has cut or copied it? For drag and drop operations this information is
stored in the DropTargetEvent.detail, but the Clipboard does not have
this information. Neither a listener is missing to tell the process
which puts the file into the clipboard that it was pasted.

--
Best regards,
Thomas Singer


On 2021-01-26 19:35, Rolf Theunissen wrote:
> Hi Thomas,
>
> The copy-past behavior is implemented with the drag-and-drop API of SWT.
> Specifically, the Clipboard and FileTransfer are of interest for the
> copy-pasting of files.
> Have a look at this article as a starter:
> https://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html#_Using_the_Clipboard
>
> Best Regards,
> Rolf
>
> Op di 26 jan. 2021 om 11:29 schreef Thomas Singer <ts-swt@xxxxxxxxxxx>:
>
>> Hi,
>>
>> For text everything works as expected. Cutting a text immediately
>> removes it from the text control (it is stored in the clipboard) and on
>> paste it will be inserted.
>>
>> But I'm trying to understand how to handle a typical file manager
>> workflow: a user selects a file in the Windows Explorer, invokes Cut
>> (Ctrl+X) and in an SWT-based application pastes the file. How can the
>> SWT-based application find out whether the file was cut or copied?
>>
>> --
>> Best regards,
>> Thomas Singer
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>
>
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